Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Treasury Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Parent [Member]	Parent [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]
Shares, Issued at Oct. 31, 2017			177,937
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2017	$ 4,537,090		$ 1,779		$ 720,115		$ 4,474,064		$ (662,854)		$ (1,910)		$ 4,531,194		$ 5,896
Net income	$ 748,151						748,151						748,151
Number of shares purchased	12,108
Purchase of treasury stock, value	$ (503,159)								(503,159)				(503,159)
Exercise of stock options and stock-based compensation issuances, shares
Exercise of stock options and stock-based compensation issuances, value	12,180				(21,789)				33,969				12,180
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	1,209				43				1,166				1,209
Stock-based compensation	28,312				28,312								28,312
Dividends, Common Stock, Cash	(62,077)						(62,077)						(62,077)
Treasury Stock, Retired, Cost Method, Amount									0
Other Comprehensive Income (Loss)	2,926										2,926		2,926
Income (loss) attributable to noncontrolling interest	(15)												0		(15)
Capital contributions	2,832												0		2,832
Shares, Issued at Oct. 31, 2018			177,937
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2018	4,768,912		$ 1,779		727,053		5,161,551		(1,130,878)		694		4,760,199		8,713
Stockholders' Equity, Other		$ 1,463				$ 372		$ 1,413				$ (322)		$ 1,463
Net income	$ 590,007						590,007						590,007
Number of shares purchased	6,619
Purchase of treasury stock, value	$ (233,523)								(233,523)				(233,523)
Exercise of stock options and stock-based compensation issuances, shares
Exercise of stock options and stock-based compensation issuances, value	16,024				(26,368)				42,392				16,024
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	1,323				14				1,309				1,323
Stock-based compensation	26,180				26,180								26,180
Dividends, Common Stock, Cash	(63,882)						(63,882)						(63,882)
Treasury Stock, Shares, Retired			(25,000)
Treasury Stock, Retired, Cost Method, Amount	0		$ (250)				(895,267)		895,517				0
Other Comprehensive Income (Loss)	(6,525)										(6,525)		(6,525)
Income (loss) attributable to noncontrolling interest	(19)												0		(19)
Capital contributions	38,183												0		38,183
Shares, Issued at Oct. 31, 2019			152,937
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2019	5,118,693		$ 1,529		726,879		4,774,422		(425,183)		(5,831)		5,071,816		46,877
Stockholders' Equity, Period Increase (Decrease)		$ (17,987)						$ (17,987)						$ (17,987)
Net income	$ 446,624						446,624						446,624
Number of shares purchased	15,952
Purchase of treasury stock, value	$ (634,057)								(634,057)				(634,057)
Exercise of stock options and stock-based compensation issuances, shares
Exercise of stock options and stock-based compensation issuances, value	23,439				(33,263)				56,702				23,439
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	1,414				(670)				2,084				1,414
Stock-based compensation	24,326				24,326								24,326
Dividends, Common Stock, Cash	(56,960)						(56,960)						(56,960)
Treasury Stock, Retired, Cost Method, Amount									0
Other Comprehensive Income (Loss)	(1,367)										(1,367)		(1,367)
Income (loss) attributable to noncontrolling interest	(10)												0		(10)
Capital contributions	5,374												0		5,374
Shares, Issued at Oct. 31, 2020			152,937
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2020	$ 4,927,476		$ 1,529		$ 717,272		$ 5,164,086		$ (1,000,454)		$ (7,198)		$ 4,875,235		$ 52,241